CN112248283A - Waste plastics are retrieved with cutting grain dewatering device - Google Patents

Abstract

The invention discloses a granulating and dehydrating device for recycling waste plastics, wherein a discharge hole of the granulating device is communicated with a feed inlet of the dehydrating device through a connecting water tank; cut grain device's structure includes: the mouth die comprises a mouth die base, a flow guide sleeve, an inner connecting base and a granulation mouth die plate, wherein the mouth die base is provided with a first feeding pipe communicated with a mouth die cavity; the granulating cutter shaft is movably supported and arranged in the inner connecting seat through a top bearing seat, the lower end of the granulating cutter shaft penetrates through a through hole in the granulating opening template and then is connected with a cutter frame with a granulating cutter, the upper part of the granulating cutter shaft is connected with a first driving device, and the lower end of the neck mold is provided with a spraying box; the structure of the dewatering device comprises: the water tank, the water drainage tank, the screen, the rotating shaft and the plurality of helical blades arranged on the rotating shaft are connected with the second driving device, so that the dehydration, drying and output of materials are realized. The device has the advantages of good granulating uniformity, high dehydration efficiency and wide application range.

Description

Waste plastics are retrieved with cutting grain dewatering device

Technical Field

The invention relates to the technical field of plastic machine equipment, in particular to a granulating and dehydrating device for recycling waste plastics.

Background

With the wider application range of plastic products and the increasing consumption of plastic products, waste plastics are increasing, and the waste plastics have the problems of light weight, large volume, difficult degradation, easy generation of various toxic substances after combustion and the like, and if the waste plastics are not treated properly, not only can the resources be wasted, but also the ecological environment of the earth can be seriously influenced. Therefore, the research on the waste plastic recycling technology is carried out, and the method has important significance for energy conservation, emission reduction and environmental protection.

In recycling waste plastics, the most common waste plastics recycling method at present is to crush waste plastics into small materials by a crusher, then send the small materials into a screw extruder to melt and extrude, and re-granulate. The extruded molten material is subjected to strand cutting and underwater cutting according to the characteristics of the material, and the underwater cutting is usually selected for low-viscosity and high-elasticity high polymer materials or materials with special requirements on granulation. The existing underwater granulating device has the defects of poor granulating uniformity, low granulating efficiency and the like; in addition, the water content of the granular materials obtained after underwater granulation is large, and the granular materials are dehydrated by adopting a common filtering and drying mode at present, but the mode has low dehydration efficiency and high energy consumption and can not meet the process requirements of an automatic production line for recycling waste plastics.

Disclosure of Invention

The technical problems to be solved by the invention are as follows: the utility model provides a cut grain dewatering device for waste plastics recovery that grain degree of consistency is good, cut grain dehydration efficiency is high, use and maintain the convenience, the device can satisfy waste plastics recovery automation line technology demand, realizes the automation mechanized operation.

In order to solve the problems, the invention adopts the technical scheme that: a waste plastics recovery with cutting grain dewatering device, include: cut grain device and dewatering device, cut through being connected the basin intercommunication between grain device's the discharge gate and dewatering device's the feed inlet.

The structure of the pelletizing device comprises: the mouth mold is composed of a cylindrical mouth mold seat, a flow guide sleeve, a cylindrical internal connecting seat and a mouth granulation template, wherein the flow guide sleeve is inserted and fixed in the inner cavity of the cylindrical mouth mold seat, the cylindrical internal connecting seat is inserted and fixed in the inner cavity of the flow guide sleeve, the mouth granulation template is fixedly covered at the bottom end of the cylindrical mouth mold seat, the bottom surface of the flow guide sleeve is an arc-shaped bottom surface which is high in front end, low in rear end and protruding upwards, a hollow annular mouth mold cavity is formed by encircling the inner cavity wall of the cylindrical mouth mold seat, the arc-shaped bottom surface of the flow guide sleeve, the outer side wall of the cylindrical internal connecting seat and the mouth granulation template, and a first feeding pipe; the granulating cutter shaft is movably supported in the cylindrical inner connecting seat through a top bearing seat fixed at the top end of the cylindrical die seat, the lower end of the granulating cutter shaft penetrates through a through hole in the granulating port template and then is connected with a cutter frame with a granulating cutter, so that the cutting edge of the granulating cutter is attached to the granulating port template, the granulating cutter shaft extending out of the upper part of the top bearing seat is connected with a first driving device, and under the driving of the first driving device, the granulating cutter shaft drives the granulating cutter to rotate to cut molten state materials extruded from the granulating port template; the lower end of the mouth die is fixedly provided with a spray box which covers the knife rest, the side wall of the spray box is provided with at least one group of spray heads, the spraying direction of each spray head faces the granulating knife and the granulating opening template, and the open opening at the bottom of the spray box is a discharge opening of the granulating device.

Further, the pelletizing and dewatering device for recycling waste plastics comprises a top bearing seat, a bottom bearing seat, a top cooling cavity, a bottom cooling cavity, a top cooling cavity and a top cooling cavity, wherein the top bearing seat comprises a cylindrical outer ring, a cylindrical inner ring inserted into an inner cavity of the cylindrical outer ring, an upper bearing cover fixedly covered at the top end of the cylindrical outer ring, and a lower bearing cover fixedly covered at the bottom end of the cylindrical outer ring; at least one first bearing is fixedly arranged in the middle through hole of the upper bearing cover, at least one second bearing is fixedly arranged in the middle through hole of the lower bearing cover, and the upper part of the granulating cutter shaft is inserted into the cylindrical inner ring and movably supported by the first bearings and the second bearings.

Further, in the granulating and dehydrating device for recycling waste plastics, an electric heating sleeve capable of heating the molten material in the die cavity is sleeved on the cylindrical die holder; the top bearing seat is connected to the top of the mouth mold through a plurality of fasteners, and the upper part of the mouth mold is provided with a heat insulation pad for reducing the influence of cooling water in the top bearing seat on the temperature of a molten material in the mouth mold cavity; at least one heat insulation plate for reducing the influence of cooling water on the temperature of the molten material in the die cavity in the spraying process is fixed at the bottom of the granulating opening die plate.

Further, aforementioned a waste plastics is retrieved and is used eager grain dewatering device, wherein, the knife rest is connected the connection structure who cuts grain arbor and is: the middle part of the knife rest is provided with a connecting through hole which enables the knife rest to be sleeved on the granulating cutter shaft, the knife rest and the pressure spring are sequentially sleeved in from the bottom of the granulating cutter shaft, the bottom of the granulating cutter shaft is fixedly connected with a fixing piece, and the two ends of the pressure spring respectively support against the knife rest and the fixing piece under the action of elastic force, so that the cutting edge of the granulating cutter fixed on the knife rest is always tightly attached to the granulating opening template.

Further, the aforesaid granulating and dehydrating device for recycling waste plastics, wherein the structure of the dehydrating device includes: the water tank is fixedly provided with a water drainage tank at the top, the bottom of the shell is fixed at the bottom of the water drainage tank, a water outlet with a filter screen is arranged at the bottom of the water drainage tank positioned outside the shell, and water in the water drainage tank can flow into the water tank through the water outlet with the filter screen; the cylindrical screen is fixed in the inner cavity of the shell through the bracket and divides the inner cavity of the shell into two independent cavities: the water drainage device comprises a cylindrical screen mesh inner cavity, a cavity formed between the cylindrical screen mesh and the wall of the shell inner cavity, an upper bearing seat is fixedly arranged on a top cover of the shell, a lower bearing seat is fixedly arranged at the bottom of a water drainage tank, a rotating shaft is movably and vertically supported in the cylindrical screen mesh inner cavity through the upper bearing seat and the lower bearing seat, a plurality of blade groups are arranged on the rotating shaft in the cylindrical screen mesh inner cavity, the blade groups are uniformly distributed at intervals along the circumferential direction of the rotating shaft, each blade group is composed of a plurality of flaky spiral blades uniformly distributed at intervals from top to bottom, and the spiral directions of spiral lifting surfaces of the flaky spiral blades are consistent; a second feeding pipe communicated with the inner cavity of the cylindrical screen is fixedly arranged on the outer side wall of the bottom of the shell, a feeding hole of the second feeding pipe is a feeding hole of the dehydration device, and a discharging hole of the connecting water tank is communicated with the feeding hole of the second feeding pipe; a discharge pipe communicated with the inner cavity of the cylindrical screen is fixedly arranged on the outer side wall of the top of the shell, and a discharge port of the discharge pipe is communicated with a feed port on the outer side wall of the discharge hopper in a sealing manner; the rotating shaft extending out of the upper bearing seat is connected with a second driving device, and under the driving of the second driving device, the rotating shaft rotates around the axis of the rotating shaft, so that the medium material entering the inner cavity of the cylindrical screen from the second feeding pipe is spirally lifted and then is output to the discharging hopper from the discharging pipe.

Further, the granulating and dehydrating device for waste plastic recovery is characterized in that the discharging pipe is of a quadrangular prism pipe structure, and the bottom surface of the discharging pipe of the quadrangular prism pipe structure is an inclined bottom surface which is gradually inclined downwards from the feeding port end of the discharging pipe to the discharging port end of the discharging pipe.

Further, aforementioned waste plastics are retrieved with cutting grain dewatering device, wherein, has seted up the installation through-hole at a hopper top surface, and exhaust pipe fixed mounting is in the installation through-hole, and the top gas outlet of exhaust pipe upwards stretches out and is connected with the fan behind a hopper top surface, and the bottom air inlet of exhaust pipe stretches into out in the hopper, and the height of the bottom air inlet of exhaust pipe is less than the height of the feed inlet of a hopper.

Further, aforementioned waste plastics are retrieved with cutting grain dewatering device, wherein, has seted up the installation through-hole at a hopper top surface, and exhaust pipe fixed mounting is in the installation through-hole, and the top gas outlet of exhaust pipe upwards stretches out and is connected with the fan behind a hopper top surface, and the bottom air inlet of exhaust pipe stretches into out in the hopper, and the height of the bottom air inlet of exhaust pipe is less than the height of the feed inlet of a hopper.

Further, the granulating and dehydrating device for recycling waste plastics is characterized in that the cylindrical screen is composed of a plurality of cylindrical screen rings which are sequentially spliced from top to bottom, every two adjacent cylindrical screen rings are fixedly spliced through corresponding connecting rings, and each connecting ring is fixed in the inner cavity of the shell through a support; the distance between the cylindrical screen and the outer contour of each flaky helical blade is 1-2 mm.

Further, in the granulating and dehydrating device for recycling waste plastics, the first driving device is a granulating motor, the granulating motor is fixed on the top bearing seat through a motor seat, and the upper end of the granulating cutter shaft extends into the motor seat and is fixedly connected with a motor shaft of the granulating motor extending into the motor seat; the second driving device is a dewatering motor, and the dewatering motor is connected with a rotating shaft extending out of the upper portion of the upper bearing seat through belt transmission.

The invention has the beneficial effects that: the device simple structure, use and maintain the convenience, the material is cut grain degree of consistency good, is cut grain dehydration efficiency high to can adapt to waste plastics recovery automation line technological requirement.

Drawings

FIG. 1 is a schematic structural view of a pellet dewatering device for waste plastic recycling according to the present invention.

Fig. 2 is a schematic structural view of the pelletizing apparatus of fig. 1.

Fig. 3 is a schematic view of the top bearing seat of fig. 2.

Fig. 4 is a schematic view of the die and spray box of fig. 2.

Fig. 5 is a schematic structural view of the flow guide sleeve in fig. 4.

Fig. 6 is a schematic view of the position between the die plate of the pelletizing opening and the blade carrier with the pelletizing blade in fig. 4.

Fig. 7 is a schematic structural view of the dehydration apparatus of fig. 1 with the water tank removed.

Detailed Description

The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and preferred embodiments.

Example one

As shown in fig. 1, the pellet dewatering device for recycling waste plastics according to the present embodiment includes: the pelletizing device 100 and the dewatering device 200 are communicated with the discharge port of the pelletizing device 1 and the feed port of the dewatering device 2 through a connecting water tank 300.

As shown in fig. 2, 3, 4, 5, and 6, the dicing apparatus 100 according to this embodiment includes: the mouth mold 4 is composed of a cylindrical mouth mold base 41, a flow guide sleeve 42 inserted and fixed in the inner cavity of the cylindrical mouth mold base, a cylindrical inner connecting base 43 inserted and fixed in the inner cavity of the flow guide sleeve, and a granulation mouth mold plate 44 fixedly covered at the bottom end of the cylindrical mouth mold base 41, wherein the bottom surface of the flow guide sleeve 42 is an arc-shaped bottom surface 420 with a high front end and a low rear end and protruding upwards, a hollow annular mouth mold cavity 40 is formed by enclosing the inner cavity wall of the cylindrical mouth mold base 41, the arc-shaped bottom surface 420 of the flow guide sleeve 42, the outer side wall of the cylindrical inner connecting base 43 and the granulation mouth mold plate 44, and a first feeding pipe 45 communicated with the mouth mold cavity 40 is fixedly arranged on the outer side wall of the front side of the. In a waste plastic recycling line for recycling waste plastic, a feed port of a first feed pipe 45 is in butt communication with a discharge port of a screw extruder 400, and a molten material extruded from the discharge port of the screw extruder 400 is fed into a port cavity 40 through the first feed pipe 45 and then extruded from each pelletizing hole 441 of a pelletizing port die plate 44. The top surface of the die cavity 40 is an arc-shaped bottom surface 420 of the flow guide sleeve 42, and the arc-shaped bottom surface 420 can guide the molten material entering the die cavity 40 from the first feeding pipe 45 to be uniformly filled in the die cavity, so as to ensure uniform and stable discharge of the molten material extruded from each granulating hole 441 on the granulating die plate 44.

As shown in fig. 2 and 4, the dicing blade shaft 1 is movably supported and set in the cylindrical inner connecting base 43 by a top bearing base 2 fixed to the top end of the cylindrical die base 41, and the lower end of the dicing blade shaft 1 is connected to the cutter holder 11 with the dicing blade 12 after passing through a through hole in the dicing die plate 44, so that the cutting edge of the dicing blade 12 is attached to the dicing die plate 44. The granulating cutter shaft 1 extending out of the top bearing seat 2 is connected with a first driving device, and under the driving of the first driving device, the granulating cutter shaft 2 drives the granulating cutter 12 to rotate, so as to cut the molten material extruded from each granulating hole 441 on the granulating opening template 44.

As shown in fig. 1 and fig. 2, in this embodiment, the first driving device is a dicing motor 8, the dicing motor 8 is fixed on the top bearing block 2 through a motor base 81, and the upper end of the dicing cutter shaft 1 extends into the motor base 81 and is fixedly connected to a motor shaft 80 of the dicing motor 8 extending into the motor base 81.

As shown in fig. 4 and 6, in the present embodiment, the connection structure of the tool rest 11 to the dicing cutter shaft 1 is: the middle part of the knife rest 11 is provided with a connecting through hole which enables the knife rest 11 to be sleeved on the granulating cutter shaft 1, the knife rest 11 and the pressure spring 13 are sequentially sleeved in from the bottom of the granulating cutter shaft 1, the bottom of the granulating cutter shaft 1 is fixedly connected with a fixing part 14, and the two ends of the pressure spring 13 respectively support against the knife rest 11 and the fixing part 14 under the action of elastic force, so that the cutting edge of the granulating knife 12 fixed on the knife rest 11 is always attached to the granulating opening template 44, and the cutting effect of the granulating knife 12 is improved.

A shower box 47 covering the tool holder 11 is fixedly provided at the lower end of the die 4, at least one set of shower heads 48 is provided on the side wall of the shower box 47, and the spraying direction of each shower head 48 is directed toward the dicing blade 12 and the dicing die plate 44. When the first driving device is started to drive the granulating cutter 12 to rotate and cut the molten material extruded from each granulating hole 441 on the granulating opening template 44, each spray header 48 is also started to rapidly spray and cool the material which is cut into granules. At this time, the cutter blade 12 cuts the molten material extruded from each of the granulating holes 441 of the granulating die plate 44 into granular material in flowing water.

As shown in fig. 4, in the present embodiment, the spray box 47 is composed of a straight cylinder section 471 and a cone section 472, the straight cylinder section 471 is located above the cone section 472, the spray headers 48 are arranged on the sidewall of the straight cylinder section 471 of the spray box 47 at intervals, and the open bottom 473 of the cone section 472 of the spray box 47 is the discharge port of the pelletizing device 100.

In this embodiment, two sets of shower heads 48 are preferably disposed on the side wall of the straight cylindrical section 471 of the shower box 47, and the two sets of shower heads 48 are distributed on the side wall of the straight cylindrical section 471 in a central symmetry manner.

Example two

The embodiment designs the top bearing seat 2 on the basis of the first embodiment to reduce the influence of the high temperature of the high-temperature molten material on the lubrication of the bearing and the related rotating parts in the top bearing seat 2 and prolong the service life of the bearing in the top bearing seat 2.

As shown in fig. 2 and 3, the top bearing seat 2 according to the present embodiment is composed of a cylindrical outer ring 21, a cylindrical inner ring 22 inserted into an inner cavity of the cylindrical outer ring, an upper bearing cover 23 fixedly sealed at a top end of the cylindrical outer ring 21, and a lower bearing cover 24 fixedly sealed at a bottom end of the cylindrical outer ring 21, and a closed annular cooling cavity 20 is defined by surrounding among an inner cavity wall of the cylindrical outer ring 21, an outer side wall of the cylindrical inner ring 22, the upper bearing cover 23, and the lower bearing cover 24. At least one first bearing 231 is fixedly arranged in a middle through hole of the upper bearing cover 23, at least one second bearing 241 is fixedly arranged in a middle through hole of the lower bearing cover 24, and the upper part of the granulating cutter shaft 1 is inserted into the cylindrical inner ring 22 and movably and vertically supported by the first bearings 231 and the second bearings 241. The upper side wall of the cylindrical outer ring 21 is provided with a water outlet 25 communicated with the annular cooling cavity 20, the lower side wall of the cylindrical outer ring 21 is provided with a water inlet 26 communicated with the annular cooling cavity 20, the water inlet 26 is connected with an external cooling liquid source in the use process of the granulating device 100, the external cooling liquid source can adopt a common water source, and the flowing water flow is used for properly cooling the high temperature transmitted to the top bearing pedestal 2 from the molten state material, so that the influence caused by the high temperature on the lubrication of each first bearing 231, each second bearing 241 and related rotating parts is reduced, and the service life of each first bearing 231 and each second bearing 241 is prolonged.

In the use process of the granulating device 100, since the continuous water flow entering the annular cooling cavity 20 can also lower the temperature of the molten material in the mouth mold cavity 40, in order to ensure that the temperature of the molten material is always at the required high temperature, in this embodiment, the cylindrical mouth mold base 41 is sleeved with the electric heating sleeve 46, the mouth mold 4 is heated by the electric heating sleeve 46, the temperature of the molten material entering the mouth mold cavity 40 is always kept at a constant high temperature, and thus the molten material extruded from each granulating hole 441 on the granulating mouth mold plate 44 is ensured to be uniformly and stably discharged.

In this embodiment, as shown in fig. 2 and 3, the top bearing seat 2 is connected to the top of the die 4 by a plurality of fasteners, and a heat insulating pad 500 is disposed on the top of the die 4, wherein the heat insulating pad 500 is disposed to reduce the influence of the cooling water in the top bearing seat 2 on the temperature of the molten material in the die cavity 40. Similarly, in the process of rapidly spray-cooling the material cut into particles by each spray header 48 in the spray box 47, the cooling water sprayed on the dicing blade 12 and the dicing die plate 44 also lowers the temperature of the material in a molten state in the die cavity 40, as shown in fig. 6, in this embodiment, at least one heat insulation plate 600 is fixed at the bottom of the dicing die plate 44, an annular protrusion 440 protruding downward is arranged at the bottom of the dicing die plate 44, each dicing hole 441 is distributed on the annular protrusion and is communicated with the die cavity 40, and the annular protrusion 440 is in close contact with the dicing blade 12. The arrangement of the heat insulation plates 600 can reduce the influence of cooling water on the temperature of the molten material in the mouth mold cavity in the spraying process.

EXAMPLE III

In this embodiment, the dewatering device 200 is designed based on the first embodiment or the second embodiment.

As shown in fig. 1 and 7, the structure of the dehydration apparatus 200 described in the present embodiment includes: the water tank 3 is fixedly provided with a water drainage tank 31 at the top of the water tank 3, the bottom of the shell 5 is fixed at the bottom of the water drainage tank, a water outlet 311 with a filter screen is arranged at the bottom of the water drainage tank outside the shell 5, and water in the water drainage tank 31 can flow into the water tank 3 through the water outlet 311 with the filter screen. The cylindrical screen 51 is fixed in the inner cavity of the shell through a bracket 52 and divides the inner cavity of the shell into two independent cavities: the water drainage device comprises a cylindrical screen inner cavity 510 and a cavity 50 formed between a cylindrical screen 51 and a shell inner cavity wall, an upper bearing seat 54 is fixedly arranged on a top cover 53 of a shell 5, a lower bearing seat 55 is fixedly arranged at the bottom of a water drainage groove, a rotating shaft 6 is movably and vertically supported in the cylindrical screen inner cavity 510 through the upper bearing seat 54 and the lower bearing seat 55, a plurality of blade groups are arranged on the rotating shaft 6 in the cylindrical screen inner cavity 510, the blade groups are uniformly distributed at intervals along the circumferential direction of the rotating shaft, each blade group is composed of a plurality of flaky spiral blades 61 uniformly distributed from top to bottom at intervals, and the spiral directions of spiral lifting surfaces of the flaky spiral blades 61 are consistent. A second feeding pipe 56 communicated with the inner cavity 510 of the cylindrical screen is fixedly arranged on the outer side wall of the bottom of the shell 5, the feeding hole of the second feeding pipe 56 is the feeding hole of the dewatering device 200, and the discharging hole of the connecting water tank 3 is communicated with the feeding hole of the second feeding pipe 56. A discharge pipe 57 communicated with the inner cavity 510 of the cylindrical screen is fixedly arranged on the outer side wall of the top of the shell 5, a discharge port of the discharge pipe 57 is communicated with a feed port on the outer side wall of the discharge hopper 7 in a sealing manner, and a material discharge port 74 is arranged at the bottom of the discharge hopper 7. The rotating shaft 6 extending above the upper bearing seat 54 is connected with a second driving device.

As shown in fig. 7, in this embodiment, the second driving device is a dewatering motor 9, and the dewatering motor 9 is connected to the rotating shaft 6 extending above the upper bearing block 54 through a belt transmission 91.

In this embodiment, the cylindrical screen 51 is formed by a plurality of cylindrical screen rings sequentially spliced from top to bottom, every two adjacent cylindrical screen rings are fixedly spliced through corresponding connecting rings, and each connecting ring is fixed in the inner cavity of the shell through a support. The cylindrical screen 51 is provided with a structure formed by sequentially splicing a plurality of cylindrical screen rings, so that the cylindrical screen is convenient to disassemble, assemble, replace, clean and maintain the rotating shaft.

In actual manufacturing production, the distance between the cylindrical screen 51 and the outer contour of each sheet-shaped helical blade 61 is controlled to be 1-2 mm. When the rotor 6 is rotated at a high speed for dewatering, the precise control of the distance ensures that the granular materials can not splash and discharge downwards through the clearance between the cylindrical screen 51 and the outer contour of each sheet-shaped helical blade 61 under the condition that the cylindrical screen 51 does not interfere with the high-speed rotation of the rotor 6.

When the pellet dewatering device is in use, the granular material and water discharged from the discharge port of the pellet cutting device 100 enter the cylindrical screen inner chamber 510 through the connecting water tank 3 and the second feed pipe 56, and at this time, most of the water in the water-containing granular material entering the cylindrical screen inner chamber 510 flows into the water tank 3 through the water outlet 311 with the screen at the bottom of the water discharge tank 31. Under the drive of the second driving device, the rotating shaft 6 rotates around the axis thereof at a high speed, and the medium material entering the inner cavity 510 of the cylindrical screen from the second feeding pipe 56 is spirally lifted and then is output from the discharging pipe 57. The airflow generated by the rotating shaft 6 in the process of high-speed rotation moves in the reverse direction with the granular materials, meanwhile, under the centrifugal action, the moisture separation on the surfaces of the granular materials is accelerated, and the separated moisture is gathered in the drainage tank 31 through the cavity 50 formed between the cylindrical screen 51 and the inner cavity wall of the shell and then flows into the water tank 3 through the water outlet 311 with the screen. In practical production and use, a water pump can be arranged outside the water tank 3, the water inlet of the water pump is communicated with the water tank 3, and the water outlet of the water pump is connected with each spray header 48 on the granulating device 100 through a water cooling device, so that water recycling is realized, and water sources are saved; meanwhile, the arrangement of the water cooling device can reduce the influence on the spray cooling effect caused by the temperature rise of circulating water used for multiple times.

As shown in fig. 7, the discharging pipe 57 in this embodiment has a quadrangular prism tube structure, the bottom surface of the discharging pipe having the quadrangular prism tube structure is an inclined bottom surface 570 that is gradually inclined downward from the feeding port end of the discharging pipe 57 to the discharging port end of the discharging pipe 57, and the inclined bottom surface 570 is disposed to facilitate the output of the particulate material from the discharging pipe 57 to the discharging hopper 7.

In this embodiment, a mounting through hole is formed in the top surface 73 of the discharge hopper, the exhaust duct 75 is fixedly mounted in the mounting through hole, a top air outlet 751 of the exhaust duct 75 extends upward out of the top surface 73 of the discharge hopper and is connected to a fan, a bottom air inlet 752 of the exhaust duct 75 extends into the discharge hopper 7, and the height of the bottom air inlet 752 of the exhaust duct 75 is lower than the height of the feed inlet of the discharge hopper 7.

In this embodiment, the discharge hopper 7 is composed of a cylindrical discharge hopper 71 and a conical discharge hopper 72, the cylindrical discharge hopper 71 is located above the conical discharge hopper 72, the feed opening of the discharge hopper 7 is located on the side wall of the cylindrical discharge hopper 71, and the bottom end air inlet of the exhaust duct 75 extends into the conical discharge hopper 72. The bottom opening of the conical discharge hopper 72 is a material discharge hole 74 at the bottom of the discharge hopper 7.

In the use process of the dewatering device 200, the moist airflow generated by the rotating shaft 6 in the high-speed rotating process and the granular materials lifted upwards by the sheet-shaped helical blades 61 enter the discharging hopper 7 through the discharging pipe 57 together, the structure of the exhaust pipe 75 is arranged, so that the moist airflow in the discharging hopper 7 is discharged out of the discharging hopper 7 through the exhaust pipe 75, the granular materials cannot be discharged out of the discharging hopper 7 through the exhaust pipe 75 along with the moist airflow, and the granular materials are output through the material discharging hole 74 at the bottom of the discharging hopper 71.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, but any modifications or equivalent variations made in accordance with the technical spirit of the present invention are within the scope of the present invention as claimed.

The invention has the advantages that: simple structure, use and maintenance convenience, the material is cut grain degree of consistency good, is cut grain dehydration efficiency high to can adapt to waste plastics recovery automation line technological requirement.

Claims (10)

1. A granulating and dewatering device for waste plastic recovery comprises: cut grain device and dewatering device, its characterized in that: the discharge hole of the granulating device is communicated with the feed inlet of the dehydrating device through a connecting water tank; the structure of the pelletizing device comprises: the mouth mold is composed of a cylindrical mouth mold seat, a flow guide sleeve, a cylindrical internal connecting seat and a mouth granulation template, wherein the flow guide sleeve is inserted and fixed in the inner cavity of the cylindrical mouth mold seat, the cylindrical internal connecting seat is inserted and fixed in the inner cavity of the flow guide sleeve, the mouth granulation template is fixedly covered at the bottom end of the cylindrical mouth mold seat, the bottom surface of the flow guide sleeve is an arc-shaped bottom surface which is high in front end, low in rear end and protruding upwards, a hollow annular mouth mold cavity is formed by encircling the inner cavity wall of the cylindrical mouth mold seat, the arc-shaped bottom surface of the flow guide sleeve, the outer side wall of the cylindrical internal connecting seat and the mouth granulation template, and a first feeding pipe; the granulating cutter shaft is movably supported in the cylindrical inner connecting seat through a top bearing seat fixed at the top end of the cylindrical die seat, the lower end of the granulating cutter shaft penetrates through a through hole in the granulating port template and then is connected with a cutter frame with a granulating cutter, so that the cutting edge of the granulating cutter is attached to the granulating port template, the granulating cutter shaft extending out of the upper part of the top bearing seat is connected with a first driving device, and under the driving of the first driving device, the granulating cutter shaft drives the granulating cutter to rotate to cut molten state materials extruded from the granulating port template; the lower end of the mouth die is fixedly provided with a spray box which covers the knife rest, the side wall of the spray box is provided with at least one group of spray heads, the spraying direction of each spray head faces the granulating knife and the granulating opening template, and the open opening at the bottom of the spray box is a discharge opening of the granulating device.

2. The pellet dewatering device for waste plastic recycling according to claim 1, characterized in that: the top bearing seat is composed of a cylindrical outer ring, a cylindrical inner ring which is inserted into an inner cavity of the cylindrical outer ring in a penetrating way, an upper bearing cover which is fixedly sealed and covered at the top end of the cylindrical outer ring, and a lower bearing cover which is fixedly sealed and covered at the bottom end of the cylindrical outer ring, wherein the inner cavity wall of the cylindrical outer ring, the outer side wall of the cylindrical inner ring, the upper bearing cover and the lower bearing cover are enclosed to form a closed annular cooling cavity, a water outlet communicated with the annular cooling cavity is formed in the side wall of the upper part of the cylindrical outer ring, and a water inlet communicated with the annular cooling cavity is formed in the; at least one first bearing is fixedly arranged in the middle through hole of the upper bearing cover, at least one second bearing is fixedly arranged in the middle through hole of the lower bearing cover, and the upper part of the granulating cutter shaft is inserted into the cylindrical inner ring and movably supported by the first bearings and the second bearings.

3. The pellet dewatering device for waste plastic recycling according to claim 2, characterized in that: an electric heating sleeve capable of heating the molten material in the die cavity is sleeved on the cylindrical die holder; the top bearing seat is connected to the top of the mouth mold through a plurality of fasteners, and the upper part of the mouth mold is provided with a heat insulation pad for reducing the influence of cooling water in the top bearing seat on the temperature of a molten material in the mouth mold cavity; at least one heat insulation plate for reducing the influence of cooling water on the temperature of the molten material in the die cavity in the spraying process is fixed at the bottom of the granulating opening die plate.

4. The pellet dewatering device for waste plastic recycling according to claim 1, 2 or 3, wherein: the connecting structure that the cutter frame is connected on the granulating cutter shaft is as follows: the middle part of the knife rest is provided with a connecting through hole which enables the knife rest to be sleeved on the granulating cutter shaft, the knife rest and the pressure spring are sequentially sleeved in from the bottom of the granulating cutter shaft, the bottom of the granulating cutter shaft is fixedly connected with a fixing piece, and the two ends of the pressure spring respectively support against the knife rest and the fixing piece under the action of elastic force, so that the cutting edge of the granulating cutter fixed on the knife rest is always tightly attached to the granulating opening template.

5. The pellet dewatering device for waste plastic recycling according to claim 1, 2 or 3, wherein: the structure of the dewatering device comprises: the water tank is fixedly provided with a water drainage tank at the top, the bottom of the shell is fixed at the bottom of the water drainage tank, a water outlet with a filter screen is arranged at the bottom of the water drainage tank positioned outside the shell, and water in the water drainage tank can flow into the water tank through the water outlet with the filter screen; the cylindrical screen is fixed in the inner cavity of the shell through the bracket and divides the inner cavity of the shell into two independent cavities: the water drainage device comprises a cylindrical screen mesh inner cavity, a cavity formed between the cylindrical screen mesh and the wall of the shell inner cavity, an upper bearing seat is fixedly arranged on a top cover of the shell, a lower bearing seat is fixedly arranged at the bottom of a water drainage tank, a rotating shaft is movably and vertically supported in the cylindrical screen mesh inner cavity through the upper bearing seat and the lower bearing seat, a plurality of blade groups are arranged on the rotating shaft in the cylindrical screen mesh inner cavity, the blade groups are uniformly distributed at intervals along the circumferential direction of the rotating shaft, each blade group is composed of a plurality of flaky spiral blades uniformly distributed at intervals from top to bottom, and the spiral directions of spiral lifting surfaces of the flaky spiral blades are consistent; a second feeding pipe communicated with the inner cavity of the cylindrical screen is fixedly arranged on the outer side wall of the bottom of the shell, a feeding hole of the second feeding pipe is a feeding hole of the dehydration device, and a discharging hole of the connecting water tank is communicated with the feeding hole of the second feeding pipe; a discharge pipe communicated with the inner cavity of the cylindrical screen is fixedly arranged on the outer side wall of the top of the shell, and a discharge port of the discharge pipe is communicated with a feed port on the outer side wall of the discharge hopper in a sealing manner; the rotating shaft extending out of the upper bearing seat is connected with a second driving device, and under the driving of the second driving device, the rotating shaft rotates around the axis of the rotating shaft, so that the medium material entering the inner cavity of the cylindrical screen from the second feeding pipe is spirally lifted and then is output to the discharging hopper from the discharging pipe.

6. The pellet dewatering device for waste plastic recycling according to claim 5, wherein: the discharging pipe is of a quadrangular prism pipe structure, and the bottom surface of the discharging pipe of the quadrangular prism pipe structure is an inclined bottom surface which is gradually inclined downwards from the feeding port end of the discharging pipe to the discharging port end of the discharging pipe.

7. The pellet dewatering device for waste plastic recycling according to claim 5, wherein: the mounting through hole has been seted up at a hopper top surface, and exhaust pipe fixed mounting is in the mounting through hole, and the top gas outlet of exhaust pipe upwards stretches out to be connected with the fan behind a hopper top surface, and the bottom air inlet of exhaust pipe stretches into out during the hopper, and the height that highly is less than the feed inlet of a hopper of the bottom air inlet of exhaust pipe.

8. The pellet dewatering device for waste plastic recycling according to claim 6, wherein: the mounting through hole has been seted up at a hopper top surface, and exhaust pipe fixed mounting is in the mounting through hole, and the top gas outlet of exhaust pipe upwards stretches out to be connected with the fan behind a hopper top surface, and the bottom air inlet of exhaust pipe stretches into out during the hopper, and the height that highly is less than the feed inlet of a hopper of the bottom air inlet of exhaust pipe.

9. The pellet dewatering device for waste plastic recycling according to claim 5, wherein: the cylindrical screen is composed of a plurality of cylindrical screen rings which are sequentially spliced from top to bottom, every two adjacent cylindrical screen rings are fixedly spliced through corresponding connecting rings, and each connecting ring is fixed in the inner cavity of the shell through a bracket; the distance between the cylindrical screen and the outer contour of each flaky helical blade is 1-2 mm.

10. The pellet dewatering device for waste plastic recycling according to claim 5, wherein: the first driving device is a granulating motor, the granulating motor is fixed on the top bearing seat through a motor seat, and the upper end of the granulating cutter shaft extends into the motor seat and is fixedly connected with a motor shaft of the granulating motor extending into the motor seat; the second driving device is a dewatering motor, and the dewatering motor is connected with a rotating shaft extending out of the upper portion of the upper bearing seat through belt transmission.

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